Automatic emergency-brake.



PATENTED APR. 9, 1907.

W. COOPER. AUTOMATIC EMERGENCY BRAKE.

APPLICATION FILED DBO.18,1906.

2 SHEETS-SHEET 1,

WIT B555 5 ATIUB gy No. 849,599. PATENTED APR. 9, 1907.

W. COOPER. AUTOMATIC EMERGENCY BRAKE.

APPLIOATION FILED DEO.18, 1906.

2 SHEETS-8331 2.

@TTGENE/ UNHE s'rarns sauna orrion.

WILLIAM COOPER, OF GEORGETOWN, COLORADO.

AUTOMATlC EMERGENCY-BRAKE.

mama.

To all whom it may concern.-

useful improvements in safety devices for hoisting and other power-driven mechanism. Frequently in the use of such mechanisman accident has happened to the engineer or other operator in charge whereby he is incapacitated and control is lost, thereby causing great loss of life or property. Such an accident'is particularly frequent in the case of a mechanism.

check or wedge descending bucket or cage in mining operatioiis, the contents thereof being dashed to the foot of the shaft.

. I have produced a device whereby the operation of such mechanism is promptly and automatically stopped in the case of such an emergency, which device more particularly consists of a member in the general form of a block normally out of engagement withthe operating mechanism, but adapted to automatically engage and block the same in case of accident to the engineer. I In the accompanying drawings, Figure 1 is a side elevation of aconventional form of hoisting mechanism iitted with my invention adapted to engage the cable spool. Fi 2 is a plan view of the same, and F ig. 3 is a reduced partial elevation showing the member arran ed to engage one of the cranlcdishs.

Tihe following is a detailed description of the drawings.

1 is the cable-spool, which in lowering the ca e or bucket is supposed in this case to revolve in the direction of the arrow in Fig. 1.

2 is the braking-surface upon which the bandv brake 3 may be applied by means of handlever 4, provided with the usual lockingquadrant 5. said cable-spool is revolved by means of the usual gears 7 and 7 and a suitable clutch (Not shown.)

8 8 are the crank-disks on the ends of shaft 6, which are operatively connected by coneating-rods and pistons to cylinders 9 9 in the usual manner.

10 is the steamipe, provided with the usual throttle 11 am branch pipes 12 12, running to the cylinders.

13 is the counterbalance-wcight device to Specification of Letters Patent.

Application filed December 18, 1906. Serial N01 348.408.

6 is the main shaft, from which Patented April 9. 1967.

normally hold band-brake 3 out ofclose engagement with braking-surface 2 of spool 1.

14 14 are pivot-standards suit-ably secured to proper foundations under the floor of the engine-room.

15 is a cross-shaft journaled in boxings 16 16, secured to standards 14 14. v

17 is a beam or lever rigidly attached intermediate of its ends to shaft 15; On the extremity of beam 17 adjacent to the hoist is secured a small platform 18 of sufiicient size to permit the oyllirato'r to stand thereon and operate the t ottle 11.

adjustable by being slid along said beam and securable in any desired position, the said weight being so adjusted as to be overbalanced by the weight of the operator on plat form 18.

20 is a crank-arm rigidly end of shaft 15.

21 is a chock-block or wedge member. preferably of the general contour indicated and of any suitable material, such as metal or wood. Said member is ada ted to slide in guides 22 22, attached to fixe support 23, which is preferably inclined, as shown. block is normally out of engagementwith the annular face 24 of the cable-spool 1, but on secured to one Said On the other extremityof said beam is mounted a weight 19,

being drawn forward becomes wedged between its su port 23 and said face v24;, thus bringing sair s 001 into a full stop and preventing the fal of the cage, bucket, skip, or car controlled by the cable.

- 25 is astandard to which is pivoted lever 26 intermediate of its ends.

27 is a connecting-rod pivotally attached to member 21 and at its other end to one end of lever 26.

28 is a second connecting-rod ivoted at one end to lever 26 and atthe ot or end to crank-arm 20.

It is evident that should th 0 rator step or fall from platform 18 the wliigli lz lt) would draw down the other end of beam 17, thus forcing the connecting-rod 28 toward the hoist, and by the action of lever 26 drawing the connecting-rod 27 forward, thus drawing the member 21 along support 23 into close engagement with face 24 of the cable-spool.

The rotation of the spool in the direction of the arrow would assist'in this wedging action, and the cable-spool would be brought to a prompt andcoi-npleto stop and the accident prevented. "in Fig. 3 I show the member 21 applied to IIO \[O conventional form of hoisting mechanism;

. the periphery of crank-disk 8, thus in case of emergency blocking the revolution of the crank-disk, and with 'it the cable-spool connected therewith.

It is evident from the above that the construction illustrated may be varied by applying the member 21 to any revolving element in the hoist whose blocking will stop the cable-spool.

I have shown my invention applied to a level of the floor of the engine-room, and so locate it that the throttle will be within con- 'venient reach of the operator. while standing on said platform.

What I desire to claim is- 1. In ower mechanism, a fixed member, a rotatabl m 'mber, a third member adapted to be wedged between said members, operative means for drawing said third member into said engagement and means whereby the weight 'said operative means, substantially as and for the purpose set forth 2. In hoists, a-rotatable member, a fixed of the operator counterbalances 13 support, a member slidable on said fixed sup- 1' port and adapted to be brought into wedging engagement'between said rotatable member and said fixed support, means for drawing said wedging member into operative and means whereby the weight of t e operator counterbalances said first-mentioned means, substantially as and for the purposeweight of the operator counterbalances said weighted lever,.substantially as and for the purpose set forth. I

4. In hoists, a rotatable member. a fixed- 'incline member, a third member adapted to be drawn up said incline member into Wedging engagement with saidrotatable member, a weighted device adapted to o erjate' said wedge member and means w ereby the weight of the operator counterbalances said weighted device, purpose set forth.

Signed at Pittsburg, Pennsylvania, this th day of December, 1906.

WILLIAM COOPER.

Witnesses:

J.'B0Yn DUFF, EDWARD A. LAWRENCE.

Iposition -45'. wedge member and means whereby the substantially as and for the 

